Modeling method of coil module for wireless power transfer system by two-port S-parameter measurement in frequency domain

Kim, Justine Jihyun; Kim, Jong-Hoon

doi:10.1109/wpt.2014.6839574

Cited by 13 publications

(2 citation statements)

References 6 publications

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“…The measurement is performed by applying a frequencyswept signal to the input terminal of the transmitter and observing the terminal voltages of the transmitter and receiver, respectively. This measurement method is popular in both eWPT and magnetic field WPT ( 21)- (24) . However, intermediate processes in the transmitting/receiving system are completely black-boxed and cannot be seen, such as the process of generating electric field, the behavior of the spatial electric field between the transmitter and the receiver, and the process of power reception from the electric field at the receiver.…”

Section: ) Measurement Of Reflection Rate and Transmission Gainmentioning

confidence: 99%

Novel Measurement Method to Determine Optimum Reception Frequency of Electric Field Wireless Power Receiver

Oyane

Yamamoto

2023

IEEJ Journal IA

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This paper proposes a novel method for measuring the characteristics of a wireless power receiver of an electric field wireless power transfer (eWPT) system. The proposed measurement method allows us to obtain the frequency response of the eWPT receiver's power-receiving characteristics with respect to the spatial electric field frequency. Conventionally, it was not possible to measure the reception characteristics of a single independent receiver. This is because a resonant eWPT transmitter has pronounced frequency dependent characteristics. As a result, frequency-dependent electric fields are emitted into space and act on the receiver. The proposed measurement method overcomes this obstacle by using the proposed device that generates a high-frequency electric field almost independently of the frequency. The proposed device generates high-frequency electric fields in space by using a terminating resistor instead of resonator circuits. Therefore, unlike resonant transmitters, the strength of the electric field generated by the proposed device does not exhibit a large frequency dependence. The proposed measurement method will also be useful for the prototyping, evaluation, and optimization of new advanced eWPT systems whose characteristics are not yet fully understood. Here, 85kHz series resonant eWPT receivers are evaluated using the proposed measurement method, and the details of this experimental device are also described.

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Section: ) Measurement Of Reflection Rate and Transmission Gainmentioning

confidence: 99%

Novel Measurement Method to Determine Optimum Reception Frequency of Electric Field Wireless Power Receiver

Oyane

Yamamoto

2023

IEEJ Journal IA

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“…5 shows the experiment environment. Mutual inductance was measured by S-parameter using a network analyzer, and the coupling coefficient can be calculated by using measured S-parameter [5]. Consequently, Fig.…”

Section: Introductionmentioning

confidence: 99%

Design of a Rechargeable Battery Wireless Charging System

Kim¹,

Yeo²

2016

Journal of electromagnetic engineering and science

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This paper presents a wireless power charging system for rechargeable batteries. Recently, misalignment between transmitting coil and receiving coils has been a significant factor to wireless power charging systems, which are prone to lateral and angular misalignment. Unfortunately, the batteries can be easily rolled because of the shape, and coils are often misaligned while charging devices, in practical situations. This paper presents the wireless power battery charging system. In order to solve the angular misalignment, two perpendicular coil having structure of 'plus (+)' shape was proposed. To validate the results, the proposed wireless power charging system was implemented at 6.78 MHz using loosely coupled resonant coils, and the system was verified as being robust to misalignment. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. ⓒ

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A Planar Magneto-Inductive Device with Modulated Mutual Inductance for Wireless Power Transmission

Seliger,

Honsa

2023

2023 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)

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Modeling method of coil module for wireless power transfer system by two-port S-parameter measurement in frequency domain

Cited by 13 publications

References 6 publications

Novel Measurement Method to Determine Optimum Reception Frequency of Electric Field Wireless Power Receiver

Novel Measurement Method to Determine Optimum Reception Frequency of Electric Field Wireless Power Receiver

Design of a Rechargeable Battery Wireless Charging System

A Planar Magneto-Inductive Device with Modulated Mutual Inductance for Wireless Power Transmission

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